Black Button
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Classic cornflowers. Rich color, almost black.
Upright plants produce abundant double and semidouble 1–1 1/2″ blooms. Prefers cool temperatures. Also known as cornflower, garden cornflower, and bachelor’s buttons.
- Edible Flowers: The petals are used to decorate desserts. Centaurea is also a popular choice for brightening up salad mix. Flavor is bland and mildly floral.
Specs:
- Plant Height: 30–38″
- Packet: 100 seeds
- Avg. 5,900 seeds/oz
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| Size | Packet, 1/2 Ounce, 1 Ounce, 1/4 Pound, 1 Pound |
|---|---|
| DAYS TO GERMINATION | 7-14 days at 60-65°F (16-18°C). |
| SOWING | Direct seed (recommended): Sow seeds thinly in rows, 6 seeds per foot, 1/4" deep, as soon as soil can be worked. Cover lightly. Keep soil surface moist until emergence. When seedlings have first true leaves, thin to 6-9" apart. Transplant: Sow 3-4 weeks before planting out. Transplant into cell packs or larger containers when the first true leaves appear. Grow at 50-55°F (10-12°C) during the night for several weeks to develop a root ball. |
| LIGHT PREFERENCE | Sun. |
| SOIL REQUIREMENTS | Any soil with good drainage. Tolerates poor soil of medium fertility. |
| PLANT SPACING | 2-9". |
| HARDINESS ZONES | Annual. |
| HARVEST | Fresh: When flowers are 1/4 to 1/2 open. |
| USES | Cut flower, edible flower, and beneficial insect attractant. Can be used as dried flower, though blooms are quite small once dried. Effective when massed for color in beds and borders. |
| SCIENTIFIC NAME | Centaurea cyanus |
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